mm/swapfile: delete outdated pte_offset_map() comment

Delete a triply out-of-date comment from add_swap_count_continuation(): 1. vmalloc_to_page() changed from pte_offset_map() to pte_offset_kernel() 2. pte_offset_map() changed from using kmap_atomic() to kmap_local_page() 3. kmap_atomic() changed from using fixed FIX_KMAP addresses in 2.6.37. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Hugh Dickins <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
niw · Jun 23, 2023 · 3fda49e · 3fda49e
1 parent 61167ad
commit 3fda49e
Showing 1 changed file with 0 additions and 5 deletions.
diff --git a/mm/swapfile.c b/mm/swapfile.c
@@ -3456,11 +3456,6 @@ int add_swap_count_continuation(swp_entry_t entry, gfp_t gfp_mask)
 		goto out;
 	}
 
-	/*
-	 * We are fortunate that although vmalloc_to_page uses pte_offset_map,
-	 * no architecture is using highmem pages for kernel page tables: so it
-	 * will not corrupt the GFP_ATOMIC caller's atomic page table kmaps.
-	 */
 	head = vmalloc_to_page(si->swap_map + offset);
 	offset &= ~PAGE_MASK;